Apparatus for teaching telegraphy.



Patented Mar. l8, 1902..

c. E. EGAN. APPARATUS FOR TEACHING TELEGBAPHY.

[Application filed Mar. 11, 1901.)

(No mm.

THE Mumps PETERS coy, PaoroLln-ad, WASNINGTON, D, c,

UNITED STATES PATTENUTF ()FFICE.

cHARLEs E. EGAN, or DURHAM, NORTH'OAROLINA, AS$IGNOR 'ro JULIAN s. oARR, on DURHAM, NORTH oARo INA.

APPARATUS FOR'T-E ACHING TELEG'RAPHY.

SIPECIFIGATION forming part of Letters Patent No. 695,447, dated March 18, 1902.

' Application filed March 11,1901. Serial No. 50,619. (No model.)

To all whom it may concern:

Be it known that I, OHARLEs E. EGAN, a citizen of the United States, residing at Durham, in the county of Durham and State of North Carolina, have inventedcertain new and useful Improvements in Apparatus for Teaching Telegraphy, of which the following is a specification.

My present invention pertains to improvements in apparatus for teaching telegraphy, the constructionand advantages of which will be hereinafter set forth, reference being had to the annexed drawings, wherein Figure 1 is a top plan view of the apparatus; Fig. 2, a side elevation of the same; Fig. 3, a perspective View of a portion of the makeand-break device; Fig. 4, a vertical sectional viewillustrating the means employed for attaching the record to the operating means, and Fig. 5, a diagrammatic View showing the circuits.

The object of my invention is to provide a simple and efficient apparat'usforteaching. telegraphy with which the student may employ a record and by imparting motion to.

the same make andbreak the circuit and cause the sounderto act or whenthe record is out of line actuate the sender orkey and cause the sounder to act. The parts are so arranged that but one batteryis necessary to the operation of the apparatus. It is also proposedto' employ a series of removable records or make-and-break devices, so that the student may be enabled to have a wide j Referring to the drawings, A indicates thebase of the apparatus, made of anysuitable material and upon which is mounted 1 a sounder B and a sender or keyO, these parts being of any usual and approved type. Nor:

mally the key or sender is open, sothat range of characters'to study and not by concurrent will not'pass therethrough. Extend-1 ing up from the base is an upright stem or.

spindle D, the upperend of which is threaded, as indicated in Fig. 4. Mounted upon said spindle is a worm-wheel E, with which meshes a worm F, formed upon a shaft G, said shaft being mounted in suitable bearings H, S61

:projectingcontacts:M, the contacts being cured upon the upper face of the base. The outer end of the shaft G extends beyond the edge ofthe base and has attached to it a crank I.

, In the form illustrated in the drawings the upper-faceof the worm-wheel is provided with a hub D, which forms a bearing for a removable record or disk J, the record being held in place by a washer K and a nutL, screwed upon the upper threaded end of the spindle. a 1 i As indicated in the drawings, the disk or record J is provided with a series of u pwardly 5 formed to correspond witha dash or dot and being arranged upon thedisk in such manner as to reproduce a message or sentence. A series of these make-and-break points or I contactsmay be formed upon the upper face ofthe disk concentric with the axis thereof, so that a finge'rN; carried by an arm 0, may

be moved over into line with one or another of said series; and thus cause one or'another sentence to berpeated by the sounder which is in circuit with said finger, as will be hereinafter-pointedout.

Arm 0 isfadjustably nounted in a post or standard P to enable the student to shift the arm N into contact'with one oranother of the series of contacts or make-'and-break points.

The circuits by which the disk and the sounder or keyv and the sender arebrought into operativerelation one with theother will be best understoodupon reference to Figs. 1

s and 5.

Mounted upon oneside of the board or base A are two binding-posts a b,l post a. being in 7 connection with the battery 0 through line d, whilepost b is in communication with the battery through'line e. The post b is in connection with the stem or spindle "d, and through it with the record through a line f, ,while a branch line 9 extends fromfthe line f or from the spindle d to the contact member C of the key 0; Post'ais through aline h connected'to one side of the sounder B, while the opposite side of the sounder is connected by a circuit or line 11 with the key and the contact-finger N. Remembering that the key 0 is normally open, the circuit will, when the contact-finger N is in connection with one of the projections M, be from the battery through the wire e, post 12, branch f, through the spindle and record to the arm N,tl1ence to the sounder, and from the sounder back to the battery through branch 7L, post a, and line (1.. Thus it will be seen that by imparting rotary motion to the record the arm N will make and break the circuit as it comes into contact with the projections M, thereby causing the sounder to repeat the message.

Assuming thatit be desired by the student to send a message, all that it is necessary to dois to shift the record so that the spring-arm N will not be in contact with one of the projections M and the circuit just described accordingly broken. By then depressing the key the circuitwillbe completed from the battery through line 6, post I), branchesf and key C, line i to the sounder, thence through line 71., post a, and line (1 back to the battery.

It is designed in the use of this apparatus to provide a series of record disks or plates,

so that, as above stated, a student shall not' learn a message simply by rote, but will accustom himself to the reception of messages and thoroughly learn the combinations of dots and dashes used in telegraphy.

Having thus described my invention, what I claim is 1. In an apparatus of the character described, the combination of a sounder; a sending-key; a disk having a series of make-andbreak contacts formed thereon; means for rotating said disk; an adjustable contactfinger working in conjunction with said series of contacts, whereby one or the other of the series may be brought into operative relation therewith; a source of electric energy; and suitable electrical connections intermediate said source of energy and the other partsof the apparatus.

2. In an apparatus of p the character de scribed, the combination of a suitable base; a sounder mounted thereon; a sender likewise mounted on said base; a stem or spindle extending upwardly from said base; a disk or plate removably mounted upon said spindle and provided with aseries of contacts formed upon said disk or plate; means for revolving said disk; an adjustable contact-finger for making connection with one or another of the series of contacts on the disks accordingto its adjustment; a source of electric energy; and connections intermediate said source of energy and the other portions of the apparatus.

3. In an apparatus of the character described, the combination of a sounder; a disk having a series of sentences formed thereon; a source of electric energy; connections intermediate said source, the sounder, and the disk; and means for bringing one or another of said sentences carried by the disk into operative relation with the sounder.

4. In an apparatus of the character described, the combination of a suitable base;

a sounder; a sending-key; a spindle extending upwardly from said base; a worm-wheel E mounted on the spindle; a worm in operative connection with said worm-wheel a disk J removably connected to said rack, said disk having a series of contacts extending from the upper face thereof; an adjustable contactfinger N; a source of electric energy; and connection intermediate said source, the sounder, the key, the disk, and said contactfinger, substantially as described.

In testimony whereof I have signed my name to this specification in the presence 01. two subscribing witnesses.

CHARLES E. EGAN.

Witnesses:

G. R. BLACKWELL, THos. M. GonMAN. 

